Michael Michael - 2 years ago 135
Javascript Question

How do I update data in indexedDB?

I have tried to get some information from W3C regarding the update of an objectStore item in a indexedDB database, but with not so much susccess.
I found here a way to do it, but it doesn't really work for me.

My implementation is something like this

DBM.activitati.edit = function(id, obj, callback){
var transaction = DBM.db.transaction(["activitati"], IDBTransaction.READ_WRITE);
var objectStore = transaction.objectStore("activitati");
var keyRange = IDBKeyRange.only(id);

objCursor = objectStore.openCursor(keyRange);
objCursor.onsuccess = function(e){
var cursor = e.target.result;
var request = cursor.update(obj);
request.onsuccess = function(){
request.onerror = function(e){
conosole.log("DBM.activitati.edit -> error " + e);

objCursor.onerror = function(e){
conosole.log("DBM.activitati.edit -> error " + e);

I have all DBM.activitati.(add | remove | getAll | getById | getByIndex) methods working, but I can not resolve this.

If you know how I can manage it, please, do tell!

Thank you!

Answer Source

Check out this jsfiddle for some examples on how to update IDB records. I worked on that with another StackOverflower -- it's a pretty decent standalone example of IndexedDB that uses indexes and does updates.

The method you seem to be looking for is put, which will either insert or update a record if there are unique indexes. In that example fiddle, it's used like this:

    phodaDB.indexedDB.addUser = function(userObject){
        //console.log('adding entry: '+entryTxt);
        var db = phodaDB.indexedDB.db;
        var trans = db.transaction(["userData"],IDBTransaction.READ_WRITE);
        var store = trans.objectStore("userData");
        var request = store.put(userObject);

        request.onsuccess = function(e){
        request.onerror = function(e){
            console.log('Error adding: '+e);

For what it's worth, you've got some possible syntax errors, misspelling "console" in console.log as "conosole".

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